Only complaint is the exposed braiding attaching the sole is exposed inside the slipper and is very uncomfortable. If you can afford it, this is the one to get. The machine is great for cardio but if your buying it for strength training you will probably max out the resistance right away or within 6 months. Comes with a nice pouch and the iems themselves have a nice sturdy feel to them. The weight rack moves side to side a lot and so far has held the weight, but it does make me nervous when I have 250-ish pounds on it at the top height for squats. When connected, you will be greeted with a voice stating the battery is high. It?s absolutely amazing ?? sound second to none just can?t say enough about Symphonized. Coming to the build, from my initial impression of these headphones, which was limited to less than 5 days in total due to defective pieces, the cushion on these pairs is really shallow, such that the ear touches the drivers plastic, making it unbearable to wear after an hour long use. These are so good. Ligera y cómoda